INSAN- A FORGETFUL BEING
The word "Insan" is derived from an arabic word "Nisyan" which means who always tend to forget.
Forgetfulness is innate in humans, so they need reminder. God gave quran as a reminder, marvelous signs in creation as a reminder. Signature is unique Identity and serves as an authority over creation.
Creation of stars, moon, sun, mountains, ocean, living species, human being itself, the internal working body parts all contains signs through which the essence of god can be perceived.
Disasters in history is another form of reminder, which repeats to remind mankind about consequences of corruption in land.
In addition, forgetfulness is also a blessing, If we do not forget then we would've always cired for the loss of loved ones, wealth, family etc. There's wisdom behind every natural trait of human beings.